Open AccessMathematical simulation of a mass transfer in a cylindrical channel
Author(s) -
O. V. Germider,
В. Н. Попов
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1479/1/012030
Subject(s) - knudsen number , mechanics , thermodynamics , reflection coefficient , mass transfer , mass transfer coefficient , knudsen flow , pressure gradient , mass flow rate , reflection (computer programming) , materials science , physics , optics , computer science , programming language
A rarefied gas flow trough a long circular tube due to pressure and temperature gradients is studied on the basis of the S-model kinetic equation. The Maxwellian mirror-diffuse reflection model is used as the boundary condition on the channel walls. The mass flow rate is calculated as a function of the small pressure and temperature gradients. Similar results presented in the literature are compared. The thermomolecular pressure effect has been modeled and the coefficient of the thermomolecular pressure difference has been calculated at various values of the accommodation coefficient and in whole range of the Knudsen number.